You’re on the wrong page – the form is on heat.se/bestall.
The <select> list of options that I need a placeholder for is the one below ‘Storlek (p? pellets)’ – with options ‘V?lj storlek’ <-(This means ‘Pick a size’), ‘6mm’, ‘8mm’, ‘ej pellets’.
I don’t want the form to be submittable when ‘V?lj storlek’ is chosen. The user should have to pick one of the other options in order for it to work.